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Temperature-tuned dimensional transition of graphitic nanoparticles and its effect on the fire safety of epoxy nanocomposites
The one- and two-dimensional (1D and 2D) carbon-based nanomaterials are extensively studied as flame retardants in the last decade, widely believed with better performances than other counterparts. However, the research for the systematic comparison between the two with similar elemental composition...
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Published in: | Composites communications 2020-12, Vol.22, p.100488, Article 100488 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The one- and two-dimensional (1D and 2D) carbon-based nanomaterials are extensively studied as flame retardants in the last decade, widely believed with better performances than other counterparts. However, the research for the systematic comparison between the two with similar elemental composition is rare. Meanwhile, the considered factors which influence the performances are mainly restricted to aspect ratio and specific surface area of the carbon-based nanomaterials, regardless of the crystallinity, nanostructure and others. Hence, we compared the flame retardant efficiency of graphitic nanotubes and nanosheets in the epoxy nanocomposites. The products with different dimensions were prepared by tuning the pyrolysis temperature. Interestingly, the nanosheets imparted lower peak of heat release rate to the nanocomposites, while the nanotubes endowed lower total heat release and smoke production amount. The high aspect ratio of the nanosheets provided strong physical barrier effect, while the broad inner cavities of the nanotubes facilitated the formation of graphitic char layers. This work is expected to uncover the flame retardant effects of 1D and 2D graphitic nanomaterials on polymer nanocomposites.
•The pyrolysis temperature was tuned to obtain graphitic 1D nanotubes and 2D nanosheets.•The 1D nanotubes imparted low heat and smoke release amount to epoxy nanocoposites.•The 2D nanosheets endowed the nanocomposites with low peak of heat release rate.•The mechanical properties and thermal stability are enhanced by the graphitic nanomaterials. |
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ISSN: | 2452-2139 2452-2139 |
DOI: | 10.1016/j.coco.2020.100488 |